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Wyświetlanie 1-10 z 611
Tytuł:
Hildebrandts theorem for the essential spectrum
Autorzy:
Bracic, J.
Diogo, C.
Powiązania:
https://bibliotekanauki.pl/articles/255837.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
essential spectrum
Hildebrandt's theorem
essential numerical range
Opis:
We prove a variant of Hildebrandt's theorem which asserts that the convex hull of the essential spectrum of an operator A on a complex Hilbert space is equal to the intersection of the essential numerical ranges of operators which are similar to A. As a consequence, it is given a necessary and sufficient condition for zero not being in the convex hull of the essential spectrum of A.
Źródło:
Opuscula Mathematica; 2015, 35, 3; 279-285
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Essential facilities doctrine in European Union Law
Autorzy:
Zalewska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/684885.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
European Union Law
American law
Essential facilities doctrine
Opis:
Formed at the end of the nineteenth century in the United States, the essential facilities doctrine was created to prevent the refusal of access to certain key equipment, which is used as an instrument to secure the dominant position of the undertaking in those markets where the emergence of competition is strictly related to obtaining access to key device. The author describes the initiation in the 1970’s of the acquisition of the American doctrine by European Union law by focusing on the role of the European Commission and the Court of Justice of the European Union in this process. Both American and European prsemises for an application of the essential facilities doctrine are presented, as well as its advantages and disadvantages.
Źródło:
Adam Mickiewicz University Law Review; 2013, 2; 167-183
2450-0976
Pojawia się w:
Adam Mickiewicz University Law Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On finite functions with non-trivial arity gap
Autorzy:
Shtrakov, Slavcho
Koppitz, Jörg
Powiązania:
https://bibliotekanauki.pl/articles/729003.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
essential variable
identification minor
essential arity gap
Opis:
Given an n-ary k-valued function f, gap(f) denotes the minimal number of essential variables in f which become fictive when identifying any two distinct essential variables in f.
We particularly solve a problem concerning the explicit determination of n-ary k-valued functions f with 2 ≤ gap(f) ≤ n ≤ k. Our methods yield new combinatorial results about the number of such functions.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2010, 30, 2; 217-245
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On essential cluster sets
Autorzy:
Mukhopadhyay, S.
Powiązania:
https://bibliotekanauki.pl/articles/1376307.pdf
Data publikacji:
1973
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Fundamenta Mathematicae; 1973, 79, 2; 159-171
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected commodity characteristics of essential oils used for healing purposes
Autorzy:
Radziejowska, Maria
Niciejewska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/23944774.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
aromatherapy
method of extracting essential oils
labeling of essential oils packaging
aromaterapia
metoda ekstrakcji olejków eterycznych
opakowania
olejki eteryczne
Opis:
The use of an essential oil with a therapeutic purpose depends on many conditions. First of all, only substances whose quality meets the guidelines of the modern, current Polish standard PN-EN ISO 9235: 2021-12 (ICS 71.100.60 - Essential oils) and which are classified as essential oils can be used in aromatherapy, i.e. for therapeutic purposes. A very important role in obtaining essential oils of high therapeutic quality is played by the place and method of cultivation of the plant from which the oil is extracted, safety in maintaining the purity of the essential oil during its extraction, and compliance with the special requirement to label the essential oil package. Fragrance, synthetic and natural oils do not meet these requirements and cannot be used for therapeutic purposes.
Źródło:
System Safety : Human - Technical Facility - Environment; 2022, 4, 1; 170-178
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodology of conformity assessment with the essential requirements for electrotechnical products
Autorzy:
Małysa, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2064805.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
conformity assessment methodology
essential requirements
electrotechnical products
Opis:
The article presents a methodical approach to conformity assessment related to the introduction, putting into service on the European market of electrical or electrotechnical products. The developed methodology can be an effective control tool, allowing to assess whether all activities within the conformity assessment performed by the manufacturer have been carried out. The aim of the study is to present the possibility of adapting the developed methodology of approach to the assessment of compliance with the essential requirements in industrial conditions. In the case of the industry being analyzed, the basis for conformity assessment is the requirements set out in the New Approach Directives. The essential requirements set out in New Approach Directives must be met if the product is placed on the market or putting into service. The article presents the implementation of the conformity assessment process based on harmonized standards with the directives related to the product in question. The application of harmonized standards in the conformity assessment process allowed the manufacturer to use the so-called principles of presumption of conformity, referred to in the Act on conformity assessment systems and market surveillance.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 265--273
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal activity of PLA foils covered with ethylocelulose containing essential oils
Autorzy:
Łopusiewicz, Łukasz
Mizielińska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1113918.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
active coatings
antifungal properties
essential oils
Opis:
The purpose of the research work was to examine the antifungal properties of cumin, rosemary and fennel essential oils. The goal of the study was also to determine antifungal activity of coatings containing the essential oils. The results of the study demonstrated that cumin, rosemary and fennel essential oils exhibited antifungal properties. The most sensitive strains were Botrytis cinerea and Mucor circinelloides. The cumin oil was found to be the most active. The growth of Botrytis cinerea and Mucor circinelloides was not observed even on medium containing 0.1% of cumin oil. The growth of Aspergillus niger, Aspergillus clavatus and Rhizopus oryzae was not noticed on mediums containig 0.5% of the oil. The similar results were obtained for fennel essential oil. 0.5% concentration of the oil in medium inhibited the growth of Botrytis cinerea, Mucor circinelloides, Aspergillus clavatus, Rhizopus oryzae. The rosemary oil did not inhibited the growth of fungi strains in concentration of 0,1%.
Źródło:
World News of Natural Sciences; 2017, 12; 27-32
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of water on the estimation of antioxidant properties of essential oils
Autorzy:
Olszowy, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/764073.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
antioxidant activity
essential oils
water impact
Opis:
This study discusses the influence of water content in measuring system on the estimation of antioxidant activity of essential oils. The presented data show that the antioxidant activity of thyme, clove, summer savory and basil essential oils strongly depends on water concentration what has important impact on the estimation of correct and reliable antioxidant activity of examined essential oils.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2015, 70, 2
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibitory activities of essential oils against Babesia canis
Autorzy:
Guz, L.
Ziętek, J.
Puk, K.
Adaszek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2087360.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Babesia canis
essential oil
natural product
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 1; 161-163
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 611

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